I personally think the original moh series for PC and playstation were terrible in trying to simulate reality.
I've tried using tactics in the moh:spearhead multiplayer demo, and even with plenty of cooperation, your tactics will be worthless immediately. The pace of the game is simply too fast.
But, however, I find the game very, very fun to play when I'm not playing AAO.
again, regarding tactics, it's simply hard to cover your buddy effectively. Sometimes (especially in rifle servers) the game becomes much like unreal tournament with people jumping all over the place.
What do I think of the new Moh games for xbox etc? They're pretty good. It's much more realistic, and tactics are a valuable asset.
Oh, and the entire d-day landing thing isn't all that great anymore (the d-day landing in the older moh games.. idk about the new ones). If someone could make a map for the D-day landing in a game as amazing as call of duty, that'd be nice.